FISH
Monstrosities     Swords & Wizardry original/official source
OSE Encounter Activity Tables     Any original/official source
Pathfinder 1e Bestiary 1     Pathfinder original/official source
Pathfinder 1e Bestiary 4     Pathfinder original/official source
Pathfinder 2e Bestiary 1     Pathfinder original/official source
Monster Manual 2     D&D 4e (no source link)
Adventures Dark And Deep     Adventures Dark And Deep (no source link)